Table 4.

Summary of previous studies

Study	Patients	Age (years)	Mean major curve (°)	Mean correction (%)	Mean estimated blood loss (ml)
McMaster [2]	5	11.9	88	58	1,243
Vogel and Lubicky [4]	4	10.4	106	49.5	Not reported
Akpinar et al. [3]	5	14.2	71.5	58.45	1,764
Yang et al. [5]	3	9.7	90	66.2	2,800
Current	6	14.2	74.6	56.4	1,640